Epilogue
Micronics’ collaboration with the well-established Chinese OEM Great Wall begins with the Wizmax G series, and the initial results are pretty solid. Voltage regulation is tight enough across the rails, ripple suppression is well-controlled, and the 12V transient response at higher loads is good. Hold-up time is also on the longer side, while average efficiency comfortably falls within the Cybenetics Gold range. The 5VSB rail exhibits decent efficiency, and the APFC stage performs well.
On the downside, there are some weak points worth noting. Inrush currents are high, vampire power at 230V should be trimmed below 0.1W, and efficiency, although at Gold levels, is not competitive in comparison with several similar Wattage units falling into the same price range.
Micronics and Great Wall clearly put effort into tuning the fan speed profile, which is relaxed enough to keep noise levels low during typical operation. The inclusion of a fan-stop mode further enhances acoustics. Still, it would be preferable if users had the option to disable it, allowing the fan to spin slowly under light loads and preventing heat buildup inside the PSU. Overall, I find that a PWM-controlled fan running at low RPMs under lighter workloads is a better approach than relying solely on a stop/start feature.
In the protection features section, which is among the most important, the OCP triggering points need to be tuned on all rails, as they are relatively high and close between hot and cold conditions. Moreover, it would be nice to see a fan failure protection feature implemented. Unfortunately, most PSU platforms don’t have fan failure protection, but it is time to help change that.
All in all, the Micronics Wizmax G 1000W is a decent-performing PSU, but the competition in this Wattage category is fierce.
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- Delivered full power at 47°C
- ATX v3.1 and PCIe CEM 5.1 compliant
- Good parts used
- Within 1% load regulation on the primary rails
- Good ripple suppression
- Quiet operation under light and mid loads
- Well-performing APFC converter
- Good transient response at 12V at higher loads
- Long hold-up time
- Alternative Low Power Mode (ALPM) compatible
- FDB (Hong Hua) fan
- 12+4-pin PCIe connector set at 600W
- OCP and OPP triggering points need adjustments
- Not competitive efficiency levels compared to similar Wattage units
- High inrush currents
- 3.3V rail’s transient response could be better (normal loads)
- Increased vampire power consumption at 230V
- No fan failure protection
